Improved railway-car wheel



1.1a. TIMBYV Car- Wheel.

Patented March 2, 1869.

H-FETERS..PHOTO-UYNOGRAFNER. WASHINGTON D C fiuiml fitteste eee dame (em- TH E ODO'RE TIMB Y,,. QF'SA RATOGA, NEW YORK.

Letters Patent No. 87,445,:lated March 2, 1869. I

, IMPROVED RAILWAY-CAR WHEEL.

The Schedule referred to 1m theseI-etters Patent; and making patrol thename To all whom it may concern:

cause the edges of the mortises to take hold of the rails, thuspreventing the wheels slipping, or being retarded in their workings, bymeans of ice or other causes, and also to cut up and clear the tracksofthe ice and other obstructions.

To enable any. one skilled in the art to understand the nature of andmanufacture my invention, I subjoin the following further descriptionthereof, reference being had to the accompanying drawing, forming partof this specification, and in which- Figure 1 represents a plan view.

Figure 2, a section on the line a: x, fig. 1.

Figure 3, a section on the line :1 yyfig. 2, showing driving-wheelsconstructed after my improved method.

Figure 4, a fragmentary section, showing a modified form of myimprovement.

A represents the driving or car-wheel, which may be constructed in theordinary manner, with a flange, Y

B, and tread, G, which is to rest upfin the rails,

The wheel A may he made either of cast, wrought, or chilled iron, steel,or of any other appropriate metal.

The tread 0 is furnished with mortises D, of'any desired shape, placedat intervals around the entire circumference, as represented in thedrawings. They may be of any desired form,-round, diamond-shaped, orotherwise, but I prefer them constructed as shown in the drawings, fig.2.

Fig. 4 represents the mortises formed straight for a short distance fromthe outside, and then flaring inwardly.

The mortises, commencing near the .base of the flange B,'run outwardly,cutting, by their course, the Fouter edge of the rim, or tread, not,however, to any great depth. The mortise itself extends completelythrough the tread, from outerto inner circumference, but always atasufiici'ent distance from theouter edge of the tread to leave a rim, F,of solid metal, running around on the outside, to connect the: mortises,and strengthen the wheel, leaving this rim, however, with the recesses Eopposite the outeredge of each mortise.

'ting the ice and "other obstructions, andloy taking hold of the track,when, by any reason, the outer edge of the tread is brought to bear uponthe rails.

-The object of having themortises in the tread of the wheel isto preventthe wheelfrom slipping, as before stated, thus avoiding much trouble inslippery weather, while running upon up-grades, drawing heavy loads, orstarting the car, ortrain, and decreasing the .weanupon thedriving-wheels and rails, which must necessarily occur when the wheelsare revolved rapidly upon the track.

The object of having the mortises wedgiug, with the larger end of themortise towards the centre of the wheel or hub, is to prevent anythingthat may chance to be. crowded into it, from sticking fast, the flaringinner surfacespermittiug it to drop out readily, upon the revolution ofthe wheel.

Having thusiiilly explained my invention,

THEODORE R; TIMBY. Witnesses:

WM. H. Bnnnnron, Jr., W. B. Demure.

'Thcse recesses are to produce the same effect, by cut- What I claim asnew, and for which I desire to se-

